57.89% is the change from 19 to 30
Calculation steps:
[( 30 - 19 ) ÷ 19] x 100 = 57.89%
Formula
Percentage change = [(30 - 19) / 19] x 100
Subtract the new number by the original number
30 - 19 = 11
11 ÷ 19 = 0.5789473684210527
0.5789473684210527 x 100 = 57.89%